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Investigators later said the baby had been dead for five to seven days.

An autopsy was conducted Tuesday, but details – including a cause of death – have not been released.

"We're not sure the exact circumstances of the baby's birth or death," Hamilton County Coroner Lakshmi Kode Sammarco said.

Sammarco said it was unclear how long the little girl lived.

"We have another pathologist taking a look at some of the physical evidence," Sammarco said. "It was just really sad. It was just really sad to see a little baby lying on the table."

Officers spoke to the 19-year-old mother and determined that whatever happened to the child happened in Kennedy Heights some time after the baby was born last week. The case was turned over to Cincinnati police.

Officers said the teen told them that she did not know she was pregnant.

The child was full-term and about 7 pounds, police said.

The child's grandmother and stepfather also accompanied the mother to the hospital.